The main difference between Kelly Green and Forest Green is brightness and saturation: both are green shades, but Kelly Green is lighter and Kelly Green is more saturated. Kelly Green and Forest Green are often confused but have distinct differences in hue, saturation, and tone. Kelly Green (#4CBB17) and Forest Green (#228B22) each suit different design contexts — understanding their differences helps you choose the right color for your project.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Kelly Green is more saturated (78% HSL vs 61%) so it reads as bolder and more memorable at logo scale, while Forest Green can feel washed out when printed small.
Forest Green hits a 4.39:1 WCAG contrast against white — safer for text-heavy interfaces — where Kelly Green only reaches 2.49:1 and risks failing AA at small body sizes.
Kelly Green is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Forest Green leans cooler and is better suited to autumn/winter layering.
Forest Green is the more muted of the two (61% saturation) and sits more calmly on large wall surfaces, while Kelly Green's higher chroma can overwhelm a room when used beyond accent pieces.
Kelly Green (#4CBB17) is a medium, vivid green with a cool-leaning undertone — it feels balanced, versatile and bright, energetic, eye-catching.
Forest Green (#228B22) is a dark, moderately saturated green with a cool-leaning undertone — it feels rich, serious, substantial and balanced in intensity.
Text legibility depends on the contrast ratio between foreground and background. WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Use these numbers to choose accessible combinations for your design.
Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.